Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 21865

Hash
000000a8c49c18c0f69dbbee2388e3de0390e78f135cb918cdfc354b8ab45903
Confirmations
19554
Time
2026-10-13 08:27:57 UTC
Median time
2026-10-13 08:19:28 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
0674c21b669c8f31773ccbcd191054fd4b0a96258e4c6f10376314609b43e9c8
Previous block
000000b8be45ed12f5f23031a1758daae3b0a8a266274a3c6af5d646c1d58267
Next block
000000c7a23d6c7df32dfe011dd5b9b5b4d7080544dfef755b155a19fae0eb6e

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 21865 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.

The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
b04ae7702fd644cc2ab5bd8ead312a8e… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0674c21b669c…14609b43e9c8 coinbase1250